Home / 105,366.28-145,391.54-67,691.72

Finding the Fourth Proportional to 105,366.28, 145,391.54 and 67,691.72

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Solution

The fourth proportional to 105,366.28, 145,391.54 and 67,691.72 is: 93,405.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,366.28 : 145,391.54 = 67,691.72 : x
  2. Step 2: Convert to fraction form
    105,366.28/145,391.54 = 67,691.72/x
  3. Step 3: Cross multiply
    105,366.28x = 145,391.54 × 67,691.72
  4. Step 4: Simplify right side
    105,366.28x = 9,841,803,416.05
  5. Step 5: Solve for x
    x = 9,841,803,416.05/105,366.28
  6. Step 6: Final answer
    x = 93,405.63

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.